Two or multi cylinder combustion engine



Dem 11923,, Y A. o. L. WENNERBY TWO OR MULTI CYLINDER COMBUSTION ENGINE Filed Deb 11, 1922 2 Shww==5heet 1 Bee. 1% B923. EM-TZYfiEfi A. o. L. WENNERBY TWO OR MULTI CYLINDER COMBUSTION ENGINE Filed Dec. 11, 1922 2 sheets Sheet 2 by I I packing boxes or the like.

Patented Dec. 18, 1923.

UNETE ETATES ARTHUR OSKAR LEONARD VENNERBY, OF HALMSTAD, SWEDEN.

Application filed December 11, 1922. Serial No. 606,271.

To all'whom it'mag concern:

Be it known that I, ARTHUR OSKAR LEONARD lVnNNnRBY, a citizen of Sweden, residing at Halmstad, Sweden, have invented certain new and useful Improvements in Two or Multi Cylinder Combustion Engines, of which the following is a specification, reference being had to the accompanying drawing.

The present invention relates to twoor multi-cylinder combustion engines of. the kind comprising a compression pump arranged between the working cylinders and reciprocating compression piston or its con necting rod and intruding within the compression chamber. By'such an arrangement the controlling means for the valves may be located entirely within the compression chamber and its driving member needs not in any place be carried externally through Besides, also other considerable advantages may be gained by means of the invention, as f. i., the fuel pumps in a simple manner may be driven by the same means as the valves.

In order to explain my invention and the manner in which it is to be performed a preferable embodiment or modification thereof is shown by way of an example in the accompanying drawing, referring to a two-cylinder engine. Fig. 1 showsthe upper, part of the cylinders and thelr cover in. vertical section and Fig. 2 is a plan view of the arrangement, the upper part of the cylinder cover being partly cut away for the sake of clearness.

Referring to the drawing the numerals 1 and 2v designate the two working cylinders, 3 i the compression pum cylinder and a the piston movable within the latter. The compression chamber, common to both of the working cylinders and connected by means of valves (the lowermost ones not shown) with both ends of. the double acting compression cylinder, is provided within a common cover 5 extending above all of the cylinders and enclosing the valves 6 and 7 intended for introducing the compressed air into the working cylinders. The arrangement is so far as described above previously known from my older Patent No. 1,418,415.

According to the invention and the specific embodiment thereof shown in the drawing the valves 6 and 7 are connected with one end of levers or controlling rods 8 and 9 respectively, the other end of such levers carrying rollers 8 and 9 coacting with cams provided on shafts or pins 10 and 11. Such shaft-sor pins are also provided with toothed wheels or segments 12 and 13 respectively and these wheels or the like are arranged on opposite sides of and in mesh with a double toothed rack 14, which intrudes within the compression chamber 5 and is connected with the piston 4 or its rod.

A nearer explanation with regard to the working of the arrangement thus described and shown seems to be superfluous to those skilled in the art.

It is to be clearly understood that the invention by no means is limited to the use of atoothed rack as a driving member connected with the piston 4 or its rod, but the rack may be changed. for f. i. a rod provided with abutments or cam members, which either may serve the purpose of oscillating the cam shafts 10 and 11 or directly act upon the the levers or controlling rods 8, 9 or their equivalents.

In the form shown the controlling rods or levers 8, 9 are pivoted to brackets 15 and 16 and serve the purpose of opening the valves against the action of closing springs of any suitable design.

As mentioned above the controlling means for the valves in a simple manner may also serve the purpose of driving the fuel pumps and an arrangement of this kind is also shown in Fig. 1. For this purpose the fuel pump cylinders may be arranged within a suitably removeable part or extension 17 ofthe common cylinder cover forming the compression chamber and such pump cylinders may be provided with spring actuated plungers 18, 19 (the springs performing the suction stroke), the ends of which extend into the path of movement of the rollers S and 9 carried by the levers 8 and 9, so

that the plunger-s are set in action simultaneously with the controlling levers. Besides ol the constructional simplification thus obtained the advantage is also gained that the injection of fuel always takes place with correct timing with regard to the opening movement of the air valves. The quantity of fuel injected during each stroke of the fuel pumps may easily be varied or regu. lated by changing the effective length of the stroke of the plungers 18, 19, i. e. they may be set more or less far into the path of movement of the rollers 8 9.

The valves 6 and 7 may also be hollow and serve as injection. nozzlesfor the fuel, but the connection between the fuel pumps and such nozzles is independent of the invention and not shown in the drawing.

hat I claim and desire to secure by Letters Patent is 1. An improvement in combustion engines having more than one working cylinder, comprising, a plurality of working cylinders, a reciprocating air compression pump arranged between two adjacent working cylinders the pump being driven from the crank shaft of the en ine, a compression chamber common to all cylinders and connected to the pump, valves for introducing air into the working cylinders, said valves being located within said compression chamber, in combination with driving means connected with the pump piston and projecting into said compression chamber, and interconnecting means also arranged within said compression chamber, for connecting said driving means and said air valve.

2. An improvement in combustion engines having more than one working cylinder, comprising a plurality of working cylinders, an air compression pump, having its cylinder arranged between two adjacent working cylinders, said pump having a reciprocable piston directly driven by a crank on the main crank shaft of the engine, a compression chamber, common to all of the cylinders, located within a hollow cover, valves for introducing air into the working cylinders and arranged within said hollow cover, driving means connected with the pump piston and projecting within said compression chamber, and interconnecting means also arranged within said chamber for connecting said driving means and said air valves.

3. An improvement in combustion engines having more than one working cylinder, comprising, a plurality of working cylinders, a reciprocating air compression pump arranged between two adjacent working cylinders and driven directly by a crank on the main crank shaft of the engine, a hollow cover common to all of the cylinders and forming a common compression chamber connected with said pump by means of valves, air valves leading to the working cylinders and arrangedwitliin said hollow cover, a rod aiiixed to the piston of said air compression pump and projecting into said compression chamber, interconnecting levers also arranged inside of said chamber and between the aforementioned rod and said air valves, and actuating means ar ranged between said rod and said levers {or opening said air valves in correct timing" relative to the strokes of the engine.

l. An improvement in combustion engines having more than one working cylinder. comprising, a plurality of working cylinders, a reciprocating, double acting air compression pump having its cylinder arranged between two adjacent working cylinders, said pump being driven directly by a crank on the main crank shaft or the engine, a hollow cover common to all of the cylinders and forming a common compression chamber, which chamber is connected by means of valves with both ends of said compres sion pump cylinder, air valves arranged within said hollow cover and controlling passage to the working cylinders, springs normally closing said valves, driving means connected with the pump pistonand projecting'into said compression chamber, and interconnecting means also arranged within said chamber between said driving means and said valves, said interconnecting'means opening said air valves in correct timing relative to the strokes of the engine.

5. Improvement in two-cylinder combustion engines, comprising a reciprocating compression pump, the cylinder of which is located between the working cylinders, a crank on the main crank shaft of the engine and intended for driving the compression pump, a hollow cover common to all of the cylinders and forming a compression chamber connected with the pump by means of valves, a double toothed rack affixed to the pump piston and intruding into the compression chamber, a revolvable toothed member arranged at each side of and in mesh with said toothed rack, a cam disc connected with each of the toothed members so as to rotate with the same, an air valve for each of the working cylinders and located within the compression chamber and an interconnecting lever for each of the air valves one end of said lever being provided with a roller carried in contact with a cam disc and the other end being in actuating connection with one of said air valves for opening the same against the action of closing springs.

6. Improvement in combustion engines having more than one cylinder,'comprising a reciprocating compression pump arranged between two adjacent working cylinders and driven from the crank shaft of the engine, a hollow cover common to all of the cylinders and forming a compression chamber connected with! the compression pump, valves for introducing the air from said chan'iber into the working cylinders said valves being located within the hollow cover, driving means connected with the pump piston and intruding into the compression chamber, interconnecting means also arranged within said chamber between the driving means and the valves, fuel pump cylinders arranged within the body of the hollow cover, suitably Within an extension reniovably affixed thereto, and fuel pump plungers reciprocably arranged within said last mentioned cylinders and located in the path of movement of the interconnecting means, so that the fuel pumps are criven by the same in correct timing with regard to the strokes of the engine.

7. Improvement in two-cylinder combustion engines, comprising a reciprocating compression pump. the cylinder of which is located between the working cylinders, a crank on the main crank shaft of the engine and intended for driving the compression pump, a hollow cover common to all of the cylinders and forming a compression chamber connected with the pump by means of valves, a double toothed rack aliiXed to compression chamber, a revolvable toothed member arranged at each side of and in mesh with said toothed rack, a cam disc connected with each of the toothed members so as to rotate with the same, an air valve for each of the working cylinders and located within the compression chamber, an interconnecting lever for each of the air valves one end of said lever being provided with a roller carried in contact with a cam disc and the other being in actuating connection with an air valve ,for open ing the same against the action of a closing spring, an extension disconncctably aiiixed to the common cylinder cover, two

fuel pump cylinders arranged within said extension and a plunger reriprocably arranged 1n each. fuel pump cylinder and acted upon by a spring tending it to perform the suction strokes, each of said plungers intruding into the path of movement of each of the rollers, the movement of which performs the pressure strokes of the fuel pumps in correct timing with regard to the strokes of the engine.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR OSKAR LEONARD WENNERBY.

Witnesses:

ERIC EnrcssoN, G. Pn'rnnsson. 

